Mark McGwire has 566 while playing 1st base.
Mark McGwire played for the St. Louis Cardinals in 1998 when he broke the single-season home run record of 61 held by Roger Maris. He would finish the season with 70, a record that has since been broken by Barry Bonds, who hit 73 in 2001.
In 1987, Mark McGwire broke the rookie record when he hit 49 home runs for the Oakland A's. His record still stands today.
In 1998, Mark McGwire broke Maris' record by nine home runs. McGwire hit 70 and Maris hit 61.
According to CNN and AP, Mark McGwire admitted on Jan. 11, 2010, to being on steroids when he broke Roger Maris' home run record in 1998.
In 1998, Mark McGwire set the single-season home run record with 70 homers. Barry Bonds broke the record in 2001, when he hit 73.
Mark McGwire broke Roger Maris' single season home run record of 61 in 1998. McGwire would finish the year with 70 home runs setting the new single season home run record. In 2001 Barry Bonds broke this record by hitting 73 home runs.
Mark McGwire broke Roger Maris' record in 1998, when he hit 70 home runs.
Mark McGwire had 70 in 1998
Maris broke Babe Ruth's record of 60 homeruns in 1961.Sammy Sosa and McGwire chased the record in 1998 and finaly that season McGwire broke Maris' current record of 61 and made the new record 70 homeruns. Also, in 1998 Sammy Sosa broke Maris' record to make it 66 homeruns. Later, in 2001 Barry Bonds broke McGwire'srecord and made the modern day record a total of 73 homeruns. Bonds went on to brake Hank Aarons record for most homeruns in a career. Aarons record was 755 and Bondsmade it 756.BUT Sosa, McGwire and Bonds all have strong evidence against them that they have taken steroids. So I believe their records should not count!